Cycloid planetary transmission gear based on line-plane conjugation

Abstract

A cycloid planetary transmission gear based on line-surface conjugation relates to a cycloid planetary transmission gear which comprises a cycloid pin wheel planetary transmission meshed pair. A smooth curve G(2) is selected on a gear surface of a gear in the meshed pair, the main normal vector direction of the curve G(2) is consistent with the normal direction of the gear surface, and the curve G(2) and the gear surface of another gear in the meshed pair form line-surface conjugation mesh. The gear surface of the gear is a tubular meshed surface which is a sphere family enveloping surface S(3) of which the sphere center moves along an equidistant line G(3), the equidistant line G(3) is a smooth curve which has a distance r from the curve G(2) along the main normal vector direction thereof, the spherical radius of spheres in the sphere family is the distance r between the equidistant line G(3) and the smooth curve G(2), and the r is smaller than the minimum curvature radius of the meshed section of the original gear surface. According to the present invention, through changing the cycloid pin wheel planetary transmission into the line-surface conjugation meshed pair, the meshed process is in the mode of point contact; therefore, the transmission ratio is great, the rigidity is good, the structure is compact, and the transmission accuracy is high. In this way, the mesh approximates pure rolling, so that the sliding ratio can be largely reduced, thereby greatly improving the efficiency, prolonging the service life, simplifying the manufacturing process, and achieving high accuracy.

Description

technical field [0001] The invention relates to a cycloidal planetary transmission gear, in particular to a cycloidal planetary transmission gear with line-plane conjugate. Background technique [0002] The traditional cycloidal (inner and outer cycloidal) pin wheel planetary transmission has the characteristics of large transmission ratio, good rigidity, compact structure, and high transmission precision. It has been widely used in various fields of national defense industry and national economic construction in recent years. The meshing pair of cycloidal planetary transmission is generally composed of cycloidal wheel and pin wheel, and the conjugate meshing pair is composed of equidistant curve and cylindrical surface of luffing cycloid. The tooth contact line is a straight line. The linear contact tooth profile has the following disadvantages: the friction and sliding rate between the meshing tooth surfaces are large, and sliding is the main factor for tooth surface wear...

AI Technical Summary

Problems solved by technology

The linear contact tooth profile has the following disadvantages: the friction and sliding rate between the meshing tooth surfaces are large, and sliding is the main factor for tooth surface wear, heat and power loss, reduced efficiency, and shortened life; with the development of production and technology, the The transmission ratio, transmission accuracy, transmission efficiency and service life of the cycloidal tooth form put forward higher requirements

At present, the commonly used point contact gears are bevel gears and arc gears, but bevel gears are only used in specific occasions, and arc gears have some shortcomings such as load capacity and transmission accuracy and cannot be used in the field of precision transmission.

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